This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 11 |
| 3 | 34 |
| 4 | 93 |
| 5 | 236 |
| 6 | 571 |
| 7 | 1338 |
| 8 | 3065 |
| 9 | 6904 |
| 10 | 15351 |
| 11 | 33782 |
| 12 | 73717 |
| 13 | 159732 |
| 14 | 344051 |
| 15 | 737266 |
| 16 | 1572849 |
| 17 | 3342320 |
| 18 | 7077871 |
| 19 | 14942190 |
| 20 | 31457261 |
| 21 | 66060268 |
| 22 | 138412011 |
| 23 | 289406954 |
| 24 | 603979753 |
| 25 | 1258291176 |
| 26 | 2617245671 |
| 27 | 5435817958 |
| 28 | 11274289125 |
| 29 | 23353884644 |
| 30 | 48318382051 |